Housing
Separate cages are the safer default.
Updated
Bird guides
Budgies and cockatiels can sometimes live in the same home, but they should usually have separate cages. Supervised time in the same room may work after quarantine and slow introductions, but a shared cage is risky because budgies can be pushy, cockatiels can be easily stressed, and one fast bite can injure a small bird.
The goal is peaceful neighboring, not forcing two different birds to become cage mates.

Budgie Questions
Budgies and cockatiels can sometimes live in the same home, but they should usually have separate cages. Supervised time in the same room may work after quarantine and slow introductions, but a shared cage is risky because budgies can be pushy, cockatiels can be easily stressed, and one fast bite can injure a small bird.
Check budgie size, energy, handling, and daily care.
Use the hub for nearby questions after this answer.
Use supplies after the care plan is clear, not before.
Pick gear that makes the daily routine easier to repeat.
Separate cages are the safer default.
Quarantine protects both birds.
A tiny budgie can still pester a cockatiel.
Shared time needs an adult watching closely.
Use separate food, water, perches, and stations.
Have a way to separate birds immediately.
Start with separate cages, separate bowls, and separate safe spaces. Let the birds hear and see each other from a distance before any shared out-of-cage time.
A new bird should not go straight into shared air or shared play. Use an avian-vet plan and a quarantine period before introductions, especially if either bird comes from a shop, rescue, or unknown home.
Budgies are small, but many are bold and relentless. A budgie that chases, lands on the cockatiel, blocks food, or pesters a resting bird is not being cute; the setup needs more distance.
Use short supervised sessions, two stations, two treat spots, and an easy way to separate them. End while both birds are calm instead of waiting for a lunge, chase, or panic flight.
Same home can work. Same cage is usually not the beginner-safe plan.
It is usually not the safest plan, especially for beginners. Separate cages protect sleep, food access, territory, and escape distance.
Yes. Some budgies are bold and persistent, and a calmer cockatiel may avoid conflict until stress builds.
Sometimes, if both birds are calm, supervised, and able to leave. Use separate perches and treats instead of putting them on one crowded stand.
Chasing, lunging, foot grabbing, blocked food, feather damage, screaming, hiding, panic flight, or one bird sitting apart are signs to separate and slow down.
Use these after the care plan is clear. Match size and materials to the bird you actually keep.
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Start with safe space, ventilation, bar spacing, and room for natural perches.

Keeps transport secure for adoption day, avian-vet visits, and emergencies.

Gives short trust-building sessions a low, predictable place to happen.

Tracks food, weight, sleep, droppings, behavior, and vet questions in one place.